Upgrade requirements (#523)

Author: jellaDolphin

requirements.in

@@ -10,7 +10,7 @@ isort
 mariadb-dyncol
 mock
 multilint
-mysqlclient
+mysqlclient==1.3.13  # django 2.2 supports 1.3.14+
 parameterized
 pygments
 pytest

requirements.txt

@@ -21,7 +21,7 @@ isort==4.3.4
 mariadb-dyncol==2.0.0
 mccabe==0.6.1             # via flake8
 mock==2.0.0
-more-itertools==4.3.0     # via pytest
+more-itertools==5.0.0     # via pytest
 multilint==2.4.0
 mysqlclient==1.3.13
 parameterized==0.6.1
@@ -31,13 +31,13 @@ pluggy==0.8.0             # via pytest
 py==1.7.0                 # via pytest
 pycodestyle==2.4.0        # via flake8
 pyflakes==2.0.0           # via flake8
-pygments==2.3.0
+pygments==2.3.1
 pytest-django==3.4.4
 pytest-flake8dir==1.3.0
 pytest-randomly==1.2.3
 pytest-super-check==1.0.0
-pytest==4.0.1
+pytest==4.0.2
 pytz==2018.7
 scandir==1.9.0            # via pathlib2
-six==1.11.0               # via mariadb-dyncol, mock, more-itertools, multilint, pathlib2, pytest, pytest-flake8dir, pytest-super-check
+six==1.12.0               # via mariadb-dyncol, mock, more-itertools, multilint, pathlib2, pytest, pytest-flake8dir, pytest-super-check
 sqlparse==0.2.4